Method and apparatus for removing halogen hydracids from biomass hydrolysates

A process for removing hydrogen halide and water from hydrolyzates obtained by means of halogen acid hydrolysis of vegetable biomasses characterized in that:

• a. two streams of substances are fed into a first container in a first step, wherein the first substance stream is the hydrolyzates and the second substance stream is a heat transfer fluid, preferably a paraffin-based oil, that has been heated up,
• b. both streams are subsequently jointly sprayed into the first container as a homogeneous mixture with a heat transfer in a temperature range of 90° C. to 120° C. from the heat transfer fluid droplets to the hydrolyzate fluid droplets, wherein complete vaporization of the water contained in the hydrolyzate and of the hydrogen halide dissolved in the hydrolyzate simultaneously takes place,
• c. wherein a mixture of granular solid particles that were dissolved in the hydrolyzates and heat transfer medium droplets arising during the vaporization can be removed by means of a pressure gradient from the first container through a connection tube into a second container, and
• d. liquid heat transfer fluid droplets and granular solid particles are separated from the gas flow with subsequent separate removal in the second container designed in the form of a cyclone or centrifugal separator.